AP®ChemistryCollege BoardExam QuestionsUnit 7: EquilibriumSolubility Equilibria

Solubility Equilibria (College Board AP® Chemistry)

Exam Questions

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Solubility Equilibria

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Solubility Equilibria

11 mark

The correct form of the solubility product for calcium phosphate, Ca3(PO4)2, is

  • [Ca2+][PO43–]

  • [Ca2+]2[PO43–]3

  • [Ca2+]3[PO43–]2

  • [Ca2+]3[PO3–]4

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21 mark

Ca(NO3)2 + K2SO4 → CaSO4 + 2KNO3

Ksp = 2.00 x 10-5 at 298 K

100 mL of a 1.70 x 10-3 M solution of calcium nitrate is slowly added to 100 mL of 1.50 x 10-3 M potassium sulfate.

Which of the following will be observed?

  • A precipitate forms because Q > Ksp

  • A precipitate forms because Q < Ksp

  • No precipitate forms because Q > Ksp

  • No precipitate forms because Q < Ksp

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31 mark

A saturated solution of Sr(OH)2 has a pH of 12.50. What is the solubility product of Sr(OH)2?

  • 3.28 x 10-5

  • 1.64 x 10-5

  • 1.58 x 10-38

  • 5.12 x 10-4

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41 mark

Addition of the following salts will affect the solubility of ZnCO3 except

  • H2SO4

  • NaHCO3

  • ZnNO3

  • Na2SO4

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